src/hotspot/share/cds/aotStreamedHeap.cpp - master - githubmirror/panama-vector

src/hotspot/share/cds/aotStreamedHeap.cpp
55 строк2 KB
Ioi Lam
8377096: Refactor AOTMapLogger::OopDataIterator implementations
10 фев 2026, 20:07
10 фев 2026, 20:077bc2475
/*
 * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#include "cds/aotStreamedHeap.hpp"

// Anything that goes in the header must be thoroughly purged from uninitialized memory
// as it will be written to disk. Therefore, the constructors memset the memory to 0.
// This is not the prettiest thing, but we need to know every byte is initialized,
// including potential padding between fields.

AOTStreamedHeapHeader::AOTStreamedHeapHeader(size_t forwarding_offset,
                                             size_t roots_offset,
                                             size_t num_roots,
                                             size_t root_highest_object_index_table_offset,
                                             size_t num_archived_objects) {
  memset((char*)this, 0, sizeof(*this));
  _forwarding_offset = forwarding_offset;
  _roots_offset = roots_offset;
  _num_roots = num_roots;
  _root_highest_object_index_table_offset = root_highest_object_index_table_offset;
  _num_archived_objects = num_archived_objects;
}

AOTStreamedHeapHeader::AOTStreamedHeapHeader() {
  memset((char*)this, 0, sizeof(*this));
}

AOTStreamedHeapHeader AOTStreamedHeapInfo::create_header() {
  return AOTStreamedHeapHeader{_forwarding_offset,
                               _roots_offset,
                               _num_roots,
                               _root_highest_object_index_table_offset,
                               _num_archived_objects};
}